Earthquakes (Grade 10)
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A is an instrument that records earthquake waves.
The amount of energy released by an earthquake is measured by its
Long term earthquake predictions are best at predicting .
- where an earthquake is likely to occur
- how much damage the next earthquake will cause
- when the next earthquake will occur
- how long the next earthquake will last
Which phrase below would best describe the plate movements that cause an earthquake?
- friction between two sliding plates, releasing energy
- smooth sliding between two plates, a gradual movement
- smooth pulling apart of two plates, a gradual movement
- friction being released as two plates move apart
The point on the earth's surface directly above the location at which an earthquake begins is known as the .
- ground zero
The actual location within the earth where an earthquake begins is known as the .
- ground zero
Small earthquakes which occur before a major movement are called .
- body waves
- P shocks
- primary shocks
As the distance from a quake's epicenter increases
- intensity increases
- intensity decreases
- wave speed increases
- the focus decreases
What part of the Earth doesn't transmit S-waves from a quake?
- liquid part of core
To find the location of an earthquakes epicenter, at least seismographs must be used.
A is a large wave caused by an underwater earthquake.
- sea-floor spread
Which of the following describes primary waves created by an earthquake?
- they cause damage on the surface
- they cause up-and-down movement in the rock
- they are the fastest-moving waves
- they are the slowest-moving waves
Smaller earthquakes or tremors called often follow a major earthquake at frequent intervals for days or months, gradually decreasing in intensity.
- primary tremors
- secondary tremors
- surface waves
What is the order in which seismic waves are recorded by a seismometer?
- S-wave, P-wave, surface wave
- surface wave, P-wave, S-wave
- P-wave, S-wave, surface wave
- S-wave, surface wave, P-wave
The Richter scale .
- is not as accurate as the Mercalli scale
- is based on vibrations of the air
- measures of the strength of a seismic wave
- is a measure of heat
Scientists can earthquakes by using seismographs, the Mercalli scale, and the Richter scale.